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Will 8sp work with 7sp setup ?

cpk1cpk1 Posts: 175
edited March 2012 in MTB workshop & tech
I have a Shimano 8sp RD-MC20 rear mech, i was wondering if it would work ok with a 7sp setup, as i think the sprocket gaps are the same for 7 and 8 speed rear cassette, also with a 7 speed pod shifter, the rear mech will only move what is specified by the shifter. Am i correct in thinking it will be fine to use ?
Thanks
Trail bike: Kona Coiler 06, Rockshox domain 318is, juicy 7s, sun rims s-type.
Commute bike: Dawes Watoga.

Posts

  • nicklousenicklouse Posts: 50,675 Lives Here
    the "spd" of the mech has nothing to do with the it. any shimano mech will work (other than MTB 10spd). as it is the shifter that sets the shift.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • cpk1cpk1 Posts: 175
    Thats what i was thinking, someone is selling alivio 8 sp shifters would these work with 7 sp rear cassette if i set the limit screws to limit the movement of the mech.
    Trail bike: Kona Coiler 06, Rockshox domain 318is, juicy 7s, sun rims s-type.
    Commute bike: Dawes Watoga.
  • The RookieThe Rookie Posts: 27,802
    Yes, they'll work just fine.
    Current steed - Whyte T129, 2013 frame, mongrel Revelations, Giant dropper, Stans S1 wheelset. 12, Magura Trail Sport brakes, 1x11. 12.8Kg
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